Somebody is sending abusive and insulting messages against me from a certain domain to many people. The police is investigating for criminal defamation. That can take months, so I want to ask his hosting provider to stop it in the meantime. How can I find out who hosts him? I have domain (owned by the offender, so complaining to [email protected]in is useless), IP address and nameserver so far. Any help appreciated!
Run a traceroute on the IP. If the last hop before your server matches the name used for nameservers you've likely found the service provider. If not then you've found someone above the hostees provider capable of intervening in the event the owner of those nameservers decides not to help.